Absolutely, and I've had a cursory play with this.

The big challenge is the lack of type data, which makes the upfront plumbing kinda painful.

The ideal setup would be to leverage Typescript's type data to generate the schemas, for those who have written their API's in TS. However, that requires hooking into the compilation phase, and I haven't had time to explore that in anger yet.

I know that getting a great solution for the Node community is really important, I just haven't cracked it yet.

Might also be source for inspiration: https://github.com/epiphone/routing-controllers-openapi

Have you looked at Tern[1] for this?

1: http://ternjs.net

edit: My bad - I do see detailed feature info below.